The production of large quantities of contamination free mechanically alloyed powders from titanium based materials has proven to be major challenge. Feasibility of such a goal can be carried out, at laboratory level, by any milling device like the very common planetary ball mill. In this case however, the possibility of a subsequent scaling up for larger production is hindered by the intrinsic limits of a planetary ball mill design. On the contrary the Simoloyer (Zoz horizontal rotary ball mill) can be experimented at laboratory level using small volume chamber-units (0.25, 0.5, and 2 1) and, for industrial production, using the large volume units (up to 400 1) based on the same conceptual design. Therefore, experiments have been conducted on blended elemental Ti-24A;-11Nb (at%) powder using the Simoloyer with a small unit-chamber (0.5 1). Due to the inherent ductility of the powder, the material has the tendency to adhere to the grinding unit and the steel balls. Further, in order to avoid high contamination and to make the process realistic from an economical point of view, the milling time has to be reduced to a minimum. The above points identify a Critical Milling Behaviour (CMB) of the system under investigation that must be kept under control to achieve the wanted goal. It will be shown that by adopting a suitable milling and discharging procedure low contamination and good yield have been substantially achieved with respect to preliminary not unambiguous trials carried out at Idaho university.
|Pages (from-to)||59 - 66|
|Number of pages||8|
|Journal||Materials Science Forum|
|Issue number||PART 1|
|Publication status||Published - 1997|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Zoz, H., Ernst, D., Weiss, H., Magini, M., Powell, C., Suryanarayana, C., & Froes, F. H. (1997). Mechanical alloying of Ti-24Al-11Nb (AT%) using the simoloyer (Zoz-horizontal rotary ball mill). Materials Science Forum, 235-238(PART 1), 59 - 66.